This is a really interesting concept! I really liked the art and the music. And the lyrics, I was quite impressed by the amount of songs available!
Unfortunately it’s a little hard to see where the midnight staircase comes into play, but I assume it would have something to do with an increasing difficulty with performing more songs or something like that? Would be interested to see how longer game plays though!
I really like the idea, it was quite challenging, but fun! Great work!